Switch



Feb. 15 1927.

W. U. PISTOR SWITCH Filed Aprii 1,

s 4 s7 5. EWVEEE ME MEET %/z WM- UNITED STATES PATENT OFFICE.

WALTER U. PISTOR, OF CINCINNATI, OHIO.

SWITCH.

Application filed April 1, 1924. Serial No. 703,507.

7 This invention relates to a switch for electric circuits such as are'employed in radio apparatus and others wherein it may be desirable to interrupt or break the flow of our- 6 rent in certain parts of the circuit.

An object of my invention is to produce an 7 improved switch in which the construction thereof is rendered as simple and free from a the usual delicate spring lingers and contacts as it is possible to make it without sacrificing any of the efficiency with which a. switch of this nature should operate.

A further object is to produce a switch in which the wear which takes place in the parts thereof may be taken up without hav- -1ng to dismantle the entire switch construction and in which the parts may be replaced easily and with'nominal expense.

These and other objects are attained in the switch described in the following specification and illustrated in the accompanying drawing in which Fig. l is a side elevation of a switch embodying my invention.

Fig. 2 is a sectional view of the switch shown in F ig. 1 and showing it mounted upon a panel such as is employed in radio sets.

Fig. 3 is a view similar to Fig. 2, but showing the parts in different relative positions.

view taken on the line 4-4 of Fig. 2.

F ig. 5 is a fragmental plan view of the switch shown in Fig. 1, showing the manner of mounting it in position upon a panel.

Fig. 6 is a perspective view of the modifield form of my invention.

Fig. 7 is a view of a detail of my inventionas disclosed in Fig. 6. v

Fig. 8 is a sectional view taken on the line 8-8 of Fig. 6.

In the form of my invention, illustrated in Figs. 1 to 5 inclusive, the body 9 is provided with a series of contacts 10 which are adapted to cooperate with a series of contacts 11 which preferably are located upon opposite sides of the central. bore of 12 with which the body is provided. Within the bore 12 a plunger 13 i located, this plunger being provided with a series of spring rings 14' which are adapted to make contact when the plunger is located at its innermost position as shown in Fig. 2.

These rings are held against relative rotation by pins 15 which are embedded within the material of the plunger as shown in Fig. 4,

Fig. 4 is an enlarged transverse sectionalv It is obvious that when the plunger is moved from one position to the other of those shown in Figs. 2 and 3, the pairs of contacts 10 and 11 are electrically connected and disconnected. In order to mount the switch a bracket 16 has been provided for attaching it to the panel 17 and the plunger has been provided with a knob 18 for facilitating its operation, a pin 19 having been provided for limiting the movement of the plunger.

The form of my invention disclosed in Figs. 6, 7 and 8 is quite similar to that'I have described, but, instead of the plunger having been provided with the spring contact rings, it has been provided with solid rings 20 which are molded on the plunger 21. The body 22 is preferably of the rectangular shape shown, but has a series of contact springs 23 located upon one side and a series of contact springs 24 located upon the opposite. These springs are held at one end by nuts on screw threaded binding posts 25 and 26 which are embedded in the material of the body 22. The free ends of the springs are provided with rounded contacts 27 which extend through slots 28 in the switch body so as to be engaged by the rings 20 of the plunger. A feature of this construction lies in the angular position occupied by the springs with relation to the body. This is clearly shown in Fig. 6. The reason for this is to permit of the springs being made long enough to have the necessary spring action which will permit the switch to function properly.

The switch which I have disclosed in the two forms described, is particularly adaptable for use in apparatus wherein it would be desirable to break several circuits simultaneously, as for example in radio where A battery, B battery, C battery and other circuits should be broken at the same time.

Having thus described my invention what I claim is An electric switch consisting of a body having a bore therein, a plunger mounted in the bore, adjustable electric contacts mount ed in the body upon opposite sides of the bore, and yielding contact rings upon the plunger adapted to establish electric contact between opposite pairs of contacts in the body or to neutralize all electric contact when the plunger is pulled out and away from the adjustable electric contacts.

In witness whereof, I afiix my signature.

WALTER U. PISTOR. 

